Means for producing concrete frameworks for buildings

ABSTRACT

A CONFIGURATIVE ARRANGEMENT OF VERTICALLY SELF-PROPELLED CONCRETE MOLDING UNITS FOR CONCURRENTLY MOLDING ALL THE CONCRETE COLUMNS AND LATERAL CONNECTING BEAMS OR FLOORS OF A BUILDING FRAMEWORK AND THEN SUCCESSIVELY MOLDING THE CONCRETE FLOORS BEGINNING WITH THE TOP FLOOR, OR THE BOTTOM FLOOR, THE MOLDING UNITS HAVING MEANS FOR IMPRESSING HORIZONTAL CORRUGATIONS OR INDENTATIONS IN THE WET CONCRETE OF THE COLUMNS, AND MOTOR DRIVEN MEANS CARRIED BY ONE OR ALL THE MOLDING UNITS FOR ENGAGING THE INDENTATIONS IN THE COLUMNS AFTER HARDENING OF THE CONCRETE FOR EFFECTING COORDINATED VERTICAL MOVEMENT OF ALL THE MOLDING UNITS IN EITHER DIRECTION.

Filed March 12, 1969 R. A. BURKLAND MEANS FOR PRODUCING CONCRETE FRAMEWORKS FOR BUILDINGS 8 Sheets-Sheet 1 a2 f ,2 if E $1 10/ n 40 22 7 i X I. l

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l 1 i a I I 26 J\ 1 1 i 40 A? 18 L4 y- Raymond A. Burk/and IAN/EN TOE wk m/w/ r? r70? NE y A. BURKLAND MEANS FOR PRODUCING CONCRETE FRAMEWORKS FOR BUILDINGS 8 Sheets-Sheet 2 Filed March 12, 1969 eal! Raymond fi- Burkld'rzd INVEN TOR 19y am Wow HTTORNEy Nov. 9., 1971 R. A. BURKLAND 3,618,182

MEANS FOR PRODUCING CONCRETE FRAMEWORKS FOR BUILDINGS Filed March 12, 1969 8 Sheets-Shaet 5 19 0 Raymond flizEunkZancZ /N VENTOK KITTORNE) 1971 R. URKLAND MEANS FOR PRODUCING CONCRETE FRAMEWORKS FOR BUILDINGS 8 Sheets-Sheet A.

Filed March 12, 1969 (4770/F/VE y Nov. 9., 1971 m. A. BURIKLAND EMWJM MEANS FOR PRODUCING CONCRETE FRAMEWORKS FOR BUILDINGS 8 Sheets-Sheet 5 Filed March 12, 1969 Fa /"0M2 a. Burkla/LJ 5y wwa Nov. 9, 1971 R. A. BURMLAND MEANS FOR PRODUCING CONCRETE FRAMEWORKS FOR BUILDINGS 8 Sheets-Sheet 6 Filed March 12, 1969 n n Tn [in IJM [WI Lilli u H lNVf/VTOH y 1n (la/(1W IYTTORNEY Wk ITO-wk 4. ifiav Raymond 1V. Bwfllwul 1971 R. BURKLAN MEANS FOR PRODUCING CONCRETE FRAMEWORKS FOR BUILDINGS 8 Sheets-Sheet '7 Fileql March 12, 1969 Keg/mono? A. Bur/(land.

/NV/\/7'0/fl flTTORNEy 1971 R. A. BURKLAND 3 mm MEANS FOR PRODUCING CONCRETE FRAMEWORKS FOR BUILDINGS Filed March 12, 1969 8 Sheets-Sheet 8 Rag/mono? 6'. Burk/01nd /N VL'NTO Q 59 1, nevi/M :4 T TOEA/EY 3,618,182 MEANS FOR PRODUCING CQNCRETIE lFRAMlEWUlRKS FUR BUILDINGS Raymond A. Burkland, 225 Beechwood Ave, Trenton, NJ. 08618 Continuation-impart of application Ser. No. 655,129, July 21, 1967. This application Mar. 12, 1969, Ser. No. 815,514

Int. Cl. 1328b 7/06 U5. Cl. 25-13]l A 10 Claims ABSC'IF 01F nrscrosnnn A configurative arrangement of vertically self-propelled concrete molding units for concurrently molding all the concrete columns and lateral connecting beams or floors of a building framework and then successively molding the concrete floors beginning with the top floor, or the bottom floor; the molding units having means for impressing horizntal corrugations or indentations in the wet concrete of the columns, and motor driven means carried by one or all the molding units for engaging the indentations in the columns after hardening of the concrete for effecting coordinated vertical movement of all the molding units in either direction.

This is a continuation-in-part of my application Ser. No. 655,129, filed July 21, 1967, now abandoned.

This invention relates to concrete molding apparatus for use in molding vertical concrete columns and floors laterally connected therewith, either including horizontal concrete floor supporting beams connected at their ends to adjacent columns or in which the floors are directly connected to the columns without the supporting beams.

One of the objects of the present invention is to provide means and a method for concurrently molding all the concrete columns and lateral concrete connections or floors of a building framework and then successively molding the concrete floors of the framework beginning with the top floor, in one embodiment of the invention, or with the lowermost floor in another embodiment of the invention.

A more specific object of the invention is to provide an improved concrete molding unit for efficiently and economically performing the abovementioned objects.

Each of my improved units for molding the interior columns of a building framework may include four or more vertically elongated side members arranged to form an enclosure corresponding to the cross-sectional shape of a column, each of the side members having a liner member or element provided with a row of vertically spaced, horizontally projecting formations for impressing vertical rows of horizontal corrugations or indentations in the wet concrete of a column. In the first mentioned embodiment of the invention pairs of transversely spaced horizontal and longitudinally flanged beams are attached to all or certain of the side members in a plane below their upper ends for providing molding spaces for molding lateral connecting beams between pairs of columns for supporting the floors of the building framework and also including vertical channel members detachably assembled between opposed edges of the side members for conducting wet concrete into the horizontal molds concurrently with the pouring of the associated columns, and also forming portions of the wall of the column portions of the molding unit. In this embodiment the uppermost floor is poured first. 1

dfilb glm llatented Nov. 9, 1971i In the second embodiment of the invention the lateral floor supporting beams are omitted and the several floors beginning with the lowermost floor are directly connected to the columns, as will later be described.

Motor driven means may be carried by each of the side members of the molding units for engagement with the indentations in the column for effecting vertical movement of the molding units in coordination with the vertical movement of the several other molding units operating in molding the concrete framework of a building.

In the molding of the side columns of a framework only two of the side members having inner liner members are necessary, the other side members having smooth inner surfaces as in a conventional slip mold. For the molding of the corner columns only one side member of each unit having the inner liner member or element described is necessary. For columns of certain sizes only a single side member of each unit may be provided with the inner liner element for impressing indentations in the wet concrete of a column and carrying the motor driven means in engagement with the indentations of the column for vertical propulsion of the mold assembly, in which case the inner surfaces of all other side members will be smooth as in ordinary slip molds.

The motors of the several molding units set up in a configuration for molding the concrete columns and latteral connections or floors of a building framework are all connected with master control means for operating them in synchronous order in effecting the vertical movements of the molding units in either direction.

A floor of wood or other suitable material may be mounted on and fastened to the horizontal beams of the lateral connection molds of the first mentioned embodiment of the invention to provide a platform for workmen and essential equipment, and also to provide a base upon which each of the successive floors of the framework is poured. In this form of the invention after all the columns of a building framework are completed and hardened the first fioor to be poured is the top floor. The vertical channel members for pouring concrete into the horizontal lateral connection beam molds are then partially disassembled for clearing the lateral connecting beams, and hinged gates or other suitable closure means forming the bottoms of the lateral beam molds can be unfastened and permitted to drop open so that all the molding units together with the platform can be lowered by means of the motors to the next floor level, thereby withdrawing the platform from the hardened floor and lateral connecting beams just completed and placing the platform in the correct position to provide a base for pouring the next floor. The same: procedure is followed in pouring the succeeding floors.

It should be understood that since in the embodiment above referred to the molding of all the successive lateral concrete beams begins with the lowermost one it is necessary that the hinged gates or other closures be unfastened and permitted to open to clear the completed and hardened lateral beams as the molding units are moved upwardly to the plane of the next lateral column connecting beam.

The floor or platform referred to is attached in sections to the horizontal flanged beams in a manner to leave the molding space between the beams entirely unobstructed during the pouring of the successive lateral concrete beams.

All the motors are connected with leveling means, pref erably automatic, for maintaining the horizontal beams forming the molds for the lateral concrete beams in a level position. The same means are employed n the second embodiment of the invention for maintaining coplanar relation of the floor areas between the columns.

In one form of my improved molding unit each of the inner liner members or elements for impressing the 1ndentations in the concrete columns may consist of an endless sprocket element mounted on a motor driven sprocket wheel j'ournaled in each end of its associated side member. The linkage members of the sprocket element may be covered by an endless sheet of strong flexible material for contact with the concrete of the column to exclude the flow of wet concrete from the spaces between the linkage members.

In another form of my improved concrete molding unit each of the liner members for impressing the horizontal indentations in the column may be in the form of a straight elongated sheet of metal or other suitable material having the indentations impressed or otherwise formed in the sheet, and installed against the inner surface of the associated side member.

In each form of my improved concrete molding unit referred to one purpose of the horizontal indentations in the columns is to serve as the equivalent of teeth engaged by the motor driven sprocket wheel or other cooperative means carried by the side members whereby, after a molded section of each column has hardened, each of the side members can be propelled upwardly thereon to a plane near the top of the hardened section and stopped with the sprocket wheel teeth or other propulsion means in locked engagement with the vertical row of indentations which will hold the side members together with all others in the framework configuration in a rigid vertical position to receive the wet concrete for another section of each column.

Another purpose of the indentations, as previously mentioned, is to provide in the first mentioned embodiment of the invention positive and controlled means for lowering the molding units to succeeding floor levels, as hereinafter described.

In the second embodiment of the present invention, previously mentioned, the lateral floor supporting beams connecting the columns are dispensed with and, instead, all the floors of the building framework are directly connected to the columns in substantially the same manner as that of the lateral beams referred to.

However, in this second embodiment of my invention the floors of the framework are poured in succession beginning with the lowermost floor, which is subsequently lifted into position as the second floor. Then another floor is poured upon the second floor with a non-adhesive substance between the two floors, and this new floor is then lifted into position as the third floor. Any desired number of additional floors may be produced in the same manner.

In this form of the invention each floor, except the base floor, is poured with an opening surrounding each of the columns, to permit the lifting of the floors to higher levels, these openings being subsequently filled with concrete for rigidly and permanently connecting the floors to the adjacent columns.

The molding units employed in this form of the invention may be substantially identical with those of the first mentioned embodiment except for certain features of adaptation to the modified procedure of molding the several floors and other portions of the building framework.

Other objects and advantages of my improved movable concrete mold and method of use will be apparent or pointed out in the following specification in which reference is directed to the accompanying drawings forming a part thereof and in which FIG. 1 is a schematic plan view of one bay of a building framework showing the arrangement of my improved concrete molding units in molding a configuration of 4 columns and lateral connections in accordance with my invention; 0

FIG. 2 is a top plan view of one form of my improved concrete molding unit;

FIG. 3 is an enlarged detail sectional view of the top portion of one of the side members of the molding unit shown in FIG. 2;

FIG. 4 is a frontal elevation of FIG. 3;

FIG; 5 is a frontal elevation of the molding unit shown in FIG. 2 partly in section;

FIG. 6 is a vertical section taken on the line 66 of FIG. 2, but showing the motors in elevation;

FIG. 7 is a section similar to FIG. 6, but showing a modified member for impressing corrugation-s or indentations in the wet concrete of a column;

FIG. 8 is a plan sectional view of a second embodiment of the present invention taken on the line 8-8 of FIG. 9;

FIG. 9 is a section in elevation taken on the line 9-9 of FIG. 8;

FIG. 10 is a plan view of a spacing block for fixing the thickness of floors in accordance with the form of the embodiment shown in FIGS. 8 and 9;

FIG. ll is a section taken on the line 11-11 of FIG. 8 and showing an edge view of the spacing block shown in FIG. 10; 1

FIGS. 12, 13, 14, 15, 16, 17 and 18 are schematic elevational views showing the successive steps in the molding of the second and third floors of a building in accordance with the embodiment shown in FIGS. 8 and FIG. 19 is a detail sectional view showing one of the leveling screws for leveling the molding units; and

FIG. 20 is a detail sectional view similar to FIG. 19, but showing the leveling screws replaced by floor lifting studs or screws.

Referring to the drawings in which like numerals designate like parts in the several views, and referring first to FIGS. 1 to 6, each of the concrete molding units used in a configurative arrangement for concurrently molding all the columns and lateral connections therefor in a building framework the molding unit, as illustrated and indicated generally by the numeral 10, includes four identical side members 12 formed of metal or other suitable material, each having an inner straight portion 14 and angular wing portions 16 extending outwardly from its vertical edges at a 45 degree angle. However, the molding unit may include more than four side members in which case the angle of the wing portions 16 would be different. Each of the straight portions 14 is arranged in right angular relation with the like portions of adjacent side members 12, but spaced apart therefrom for assembly there-between of channel members 18, made in three vertically aligned sections which are detachably bolted to adjacent wing portions 16 in the same angular position, so that the floor portion of each channel member is in a 45 degree angular relation with the adjacent straight portions of the side members 12. This forms a column mold of octagonal cross-sectional shape, and a column 20 (FIGS. 5, 6 and 7) molded therein will be of octagonal cross-section.

As shown in FIGS. 1, 2, 5, 6 and 7 the portion of each molding unit 10 for molding the concrete lateral connections consists of pairs of horizontal flanged beams 22 having outwardly projecting longitudinal flanges 22 along their upper edges, which beams are detachably bolted at their ends to right angular members 23, which members are detachably bolted to adjacent wing portions 16 of pairs of spaced side members 12, as more clearly shown in FIG. 2. The lower open ends of the channel members 18 are in a plane slightly above the respective spaces 22 between the flanged beams 22, which spaces form the molds for the lateral connections 24 (FIG. 1), the bottoms of these molds being formed by hinged gates 25 or other suitable closure means. These gates are held in molding position by latches 25' (FIG. or other suitable means which when released will permit the gates to fall open by gravity, so that the molding units when moving vertically in either direction will clear the hardened lateral connections 24.

In the molding of the concrete lateral connections the hinged gates 25 are closed and latched and the wet concrete is conducted into the molding space 22- through the channel members 18. Then, after the lateral connections harden the gates are unfastened and drop open to permit the flanged beams 22 to be withdrawn upwardly to the next floor level where the gates are again fastened in closed position for the molding of another section of each of the columns together with the lateral conned tions 24.

A floor 26 made of wood or other suitable material is bolted or otherwise rigidly fastened to the beams 22 and this not only provides a platform for the workmen and essential equipment, but also provides a base upon which to pour the concrete floors 27, indicated in broken lines in FIGS. 5, 6 and 7, and also partially shown in FIG. 1. Each of the floors 26 is made in sections and attached to the flanges 22' in a manner to leave the spaces 22" between the beams 22 unobstructed to clear the lateral connections 24-, as shown in FIGS. -1 and 5.

After all the concrete columns together with the lateral connections are completed and hardened the concrete floors 27 are then poured in succession beginning with the top floor, the molding units 10 being moved downwardly :along the columns to the successive floor levels by the same means through which the molding units are moved upwardly during the molding of the concrete columns and lateral connections, and which means will now be described.

However, it should be pointed out that in the downward movement of the molding units the hinged gates must be open to permit the beams 22 topass by the hardened lateral connections. Also it is necessary to disassemble the sections of the channel members 18 beginning with the lowermost sections, and reassemble them as they clear the respective lateral connections. For example, after the lowermost sections are removed from the wing portions 16 of the side members 12, the molding units can be lowered until stopped by abutment with the lower end of the next section. Since the floor portions of the respective channels 18 form portions of the wall of each column mold the sections are reassembled after passing the lateral connections to hold the molding unit assembly rigidly together.

In the embodiment of my invention shown in FIGS. 2 to 6 the means for forming the horizontal corrugations or indentations 19 in the column 20 include sprocket wheels 28 and 29 journaled in the respective ends of each of the side members 12. The upper sprocket wheel 29 of each side member is connected by means of a drive chain 30 to a motor 3 2, which is so mounted on the side member 12 as to travel with it. Each motor is provided with a reduction gear 33 (FIG. 2). An endless sprocket 3-4 is mounted on each of the sprocket wheels 28 and 29. Each sprocket may comprise a series of rollers or rods 36 one run of which is supported against the inner surface 14 of its associated side member -12. The rollers 36 are connected together by chain links 38, and they may be covered by an endless sheet of flexible but strong material 4-0 to shield the rollers against contact with the wet concrete. The teeth of the sprocket wheels 28 and 29 engage the rollers 36-. Although the sheet 40 is shown as permanently corrugated to fit over the rollers 36, the corrugations in the flexible sheet may be omitted, since the pressure of the wet concrete will force it into conformity with the rollers, thus leaving the corrugations 19 in the columns.

As shown more clearly in FIG. 6, after a molded section of a column has hardened the four side members 12 may be moved upwardly by means of the motors 32 to a position in which the top of the hardened section will be flush with the bottom edges of the beams 22 where they will be held in rigid alignment with the column until the next section is poured and hardened. Also during the molding operation the spaces 22" be tween the flanged beams 22 are filled with concrete to form the lateral connections 24.

It should be understood that for certain types of building structures the channel members 18 may be omitted or modified in size and arrangement to mold columns in square or other desired cross-sectional shape. Also, as shown in FIG. 1, only two side members having the means for impressing indentations are used in pouring the side columns 20 and only one such side member for pouring the corner columns 20".

In the embodiment of my invention shown in FIG. 6, the endless sprocket 34- and the endless cover sheet 40 are omitted and the horizontal corrugations or indentations are formed by means of a sheet of metal or other suitable material 42 having permanent corrugations 43 or the like for forming corresponding horizontal indentations in the wet concrete. Each sheet is supported by any suitable means (not shown) against the straight section 14 of its associated side member 12. These sheets may be stripped from the column when cleared by the bottom end of the molding unit 10. The side members 12 of the molding unit 10 are moved upwardly or downwardly by means of sprocket wheels 44 journaled in the bottom ends of the side members 12 which wheels are connected by drive chains 46 to motors 48. The climbing or descending operations of the sprocket wheels 44 in the corrugations of the sheet 412 correspond with those of the sprocket wheels 28 shown in FIG. 5, the motors 48 being mounted on the side members 12 of the mold 10 and movable together with them.

As previously mentioned, with either of the embodiments of my invention as described the side members 12 can not only be moved upwardly preliminary to molding a new section of a column, but can also be moved downwardly in successive steps with the floor 26 in the procedure of pouring the several concrete floors 27, the building framework beginning with the top floor.

As previously mentioned, all the motors in a configuration for producing a complete building concurrently are connected to control means which not only maintain all the beams 22 for molding the lateral connections 24 in a uniform plane and level position, but also synchronize the vertical movements of the molding units. However, since various control means for the purposes mentioned may be employed, no specific means for such purposes will be described.

As previously mentioned, the molding units 10-a shown in FIGS. 8 to 20 are substantially identical with the corresponding molding units 10 shown in FIGS. 1 to 6, except for certain essential features of construction for adapting the molding units to the modified procedure of molding the several floors and other framework of a building in which the molding of the floors begins with the lowermost, instead of the uppermost, floor; also in which the lateral floor supporting beam 24- and the molding equipment therefor of the first embodiment are eliminated and the respective floors directly connected to the adjacent columns 20.

In this second form of the invention the side members 16-11 of the molding units 1lla are formed with lateral horizontal flanges 16-11 on. their lower ends. These flanges are provided with threaded openings 16-0 near their outer edges for the alternate insertion therein of leveling screws 16-d and lifting studs 16e (FIGS. 19 and 20), the use of which will later be explained. Also, in this form of the invention, the vertical channel members IS-a (FIGS. 8 and 9) extend entirely to the lower end of the molding unit 10-42 for pouring the concrete floors, instead of terminating at the lateral connection beam molding members 22 of the first embodiment; and

the channel members 18a do not require dismantling and reassembling during the molding procedure, as is required of the molding units 18 of the first mentioned embodiment of the invention. However, the channel members 18-a form portions of the walls of the molding units in the same manner as the channel members 18. The means for forming the horizontal corrugations or indentations 19 in the columns 20 may be the same in both forms of the invention and are given the same reference numerals in the drawings.

In this second embodiment of the invention the base or ground floor F-1 of the building framework preferably includes a plurality of laterally spaced concrete blocks B embedded in the ground and having flat horizontal top surfaces B-1 in coplanar relation for supporting the molding units -a at the beginning of the molding procedure and, also, for permanently supporting the columns of the building framework in vertical relation. The base floor between the blocks F-l may be of any suitable composition, but it must be level with the surfaces F2 and suitably surfaced to support the second floor to be poured thereon and subsequently lifted after it hardens to its permanent level.

The first step in the molding procedure is to mount the molding units 10a on the blocks B, as shown in FIG. 12, with spacing blocks 16-1, of the precise thickness of the floor A-2 to be poured on the base floor F-1 inserted between adjacent blocks B and flanges 16b of the side members 16-a. The blocks 16-) may be made of wood or other suitable material in circular segmented form, as shown in FIG. 10, and of a diameter to fall inside the leveling screw openings 16c. The molding units are then leveled by means of the leveling screws 16d. 'I hese screws are afterward removed from the openings and replaced by floor lifting studs or screws 16c the lower ends of which are formed with angular projections to be molded into the floor F-2, as shown in FIG. 13, and after this floor is poured and hardened lifting nuts 16g are applied to the threaded ends of the studs 16c.

The floor F2 is poured through the channels 18-a simultaneously with the first sections of the columns 20. These channel members 18a may be provided at their lower ends with downwardly sloping chutes 1=8b overhanging the peripheries of the spacing blocks 16- as shown in FIG. 11. The block 16f thus serve as cores to form circular openings 16-h in the floor F-2 surrounding the columns 20, to permit lifting it to its permanent level to become the second floor of the building framework, as shown in FIG. 14. After the floor F2 is lifted, by means of the molding units 10-a, to its second floor position, as shown in FIG. 14, the nuts 16-g are removed from the lifting studs 16-e, as shown in FIG. 15. Temporary molds 16-i are then constructed below the floor F-2 on supporting legs 16- and surrounding the openings 16h, and the openings filled with concrete as indicated at 16k, thereby permanently connecting floor F2 to the adjacent portions of the columns 20.

As shown in FIG. 16 the studs 16e are then cut off level with the top of the floor F-Z, and the spacing blocks 16f inserted between the floor and the flanges 16-h of the molding units 10a. The leveling screws 16-d are then reinserted in the flanges to level the molding units. Polyethylene or other non-adhesive substance is next applied to the surface of floor F-2 and another floor F3 is poured on it together with another section of each of the columns 20, as shown in FIG. 17; and this floor is subsequently lifted to its permanent level as the third floor of the building framework in the same manner as that described in connection with floor F-Z, but with a new set of lifting studs. The fourth floor (not shown) is then poured on the third floor and lifted to its permanent position in the same manner described in connection with floors F-Z and F3. As many additional column sections and floors as may be required in a building framework can be produced and rigidly connected with all the floors in their permanent positions. v y

In both embodiments of the invention vertical reinforc: ing rods R molded into the columns 20 and horizontal rods R1 (shown in broken lines) molded into the floors may be provided as required. V

And in both embodiments of the invention the method of producing an entire concrete framework of a building structure is accomplished by placing a predetermined configuration of the vertically movable molding units on suitable footings and moving said units upwardly or downwardly along sections of the columns as they are poured and allowed to harden according to which described method is employed.

From the foregoing description it will be seen that with a configurative arrangement of my improved concrete molding units the entire framework of a building structure can be produced concurrently in one series of operations.

Since further changes or modificationsmay be made in my improved concrete molding equipment without departing from the spirit or scope of my invention, it should be understood that the embodiments of my invention shown and described are intended to be illustrative only, and restricted only by the appended claims.

I claim:

1. A vertically movable concrete molding units for molding concrete columns and floor connections in integral relation therewith, said unit comprising, in combination, a plurality of vertically elongated side members of sheet material forming an enclosure corresponding in cross-section to that of a concrete column to be molded therein with, at least, one side member of each unit supporting on its inner surface a liner member having means therein for impressing horizontal indentations in wet concrete poured into the mold formed by said side members; and motor driven means engaged with the indentations for moving said molding unit vertically in either direction after hardening of the concrete.

2. A vertically movable concrete molding unit as in claim 1 in which the liner member for impressing the horizonal indentations in the wet concrete comprises an endless sprocket element supported on the inner surface of one of said side members and mounted on sprocket wheels journaled in the respective ends of their associated side member for engagement of said sprocket element.

3. A vertically movable concrete molding unit as in claim 1 in which the liner member for impressing the horizontal indentations in the wet concrete comprises a vertically elongated sheet of stiff material supported on the inner surface of one of said side members, said sheet having indentations formed therein, and said side members having a sprocket journaled in its lower end for engagement with the indentations in said elongated sheet.

4. A vertically movable concrete molding unit as in claim 1 in which certain of the side members are vertically channeled for pouring concrete outside the column molding portions of the molding unit.

5. A vertically movable concrete molding unit as in claim 1 in which the floor connections include lateral concrete beams molded concurrently and integrally connected with adjacent columns.

6. A vertically movable concrete molding unit as in claim 1 in which the floor connections comprise openings in the floor surrounding adjacent columns subsequently filled with wet concrete around the columns after they are hardened for permanently connecting said floors directing thereto.

7. A vertically movable concrete molding unit as in claim 2 and including an endless sheet of flexible material surrounding said endless sprocket element to shield it from contact with the wet concrete.

8. A vertically movable concrete molding unit as in claim 4 in which each of the channeled members is formed in a plurality of vertical sections detachably fastened to other adjacent side members.

9. A vertically movable concrete molding unit as in claim 6 in which certain of the elongated side members are provided at their lower ends with lateral horizontal flanges each having therein a vetrically threaded opening for the alternate insertion therein of leveling screws for leveling the molding unit, and floor lifting studs molded into adjacent floors to be lifted to higher respective permanent levels.

10. A vertically movable concrete molding unit as in claim 9 and including spacing blocks inserted between the flanges on said side members and a floor therebelow for precisely spacing the thickness of a new floor to be poured on said floor.

References Cited J. SPENCER OVERHOLSER, Primary Examiner 10 DEWALDEN W. JONES, Assistant Examiner U.S. Cl. X.R. 

